Only pass -export-dynamic to linker, not compiler

Clang does not like the -export-dynamic flag. The compiler does
not need it in the first place, so we can avoid the problem by
only setting it for the linker
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

configure.ac

@@ -2158,7 +2158,7 @@ if test "$with_driver_modules" = "yes" || test "$with_driver_modules" = "check";
 fi
 
 if test "$with_driver_modules" = "yes" ; then
-  DRIVER_MODULE_CFLAGS="-export-dynamic"
+  DRIVER_MODULE_LDFLAGS="-export-dynamic"
   case $ac_cv_search_dlopen in
     no*) DRIVER_MODULE_LIBS= ;;
     *) DRIVER_MODULE_LIBS=$ac_cv_search_dlopen ;;
@@ -2166,7 +2166,7 @@ if test "$with_driver_modules" = "yes" ; then
   AC_DEFINE_UNQUOTED([WITH_DRIVER_MODULES], 1, [whether to build drivers as modules])
 fi
 AM_CONDITIONAL([WITH_DRIVER_MODULES], [test "$with_driver_modules" != "no"])
-AC_SUBST([DRIVER_MODULE_CFLAGS])
+AC_SUBST([DRIVER_MODULE_LDFLAGS])
 AC_SUBST([DRIVER_MODULE_LIBS])
 
 

src/Makefile.am

@@ -14,13 +14,13 @@ INCLUDES =	-I../gnulib/lib					\
 		-DIN_LIBVIRT					\
 		$(GETTEXT_CPPFLAGS)
 
-AM_CFLAGS =	$(DRIVER_MODULE_CFLAGS)				\
-		$(LIBXML_CFLAGS)				\
+AM_CFLAGS =	$(LIBXML_CFLAGS)				\
 		$(WARN_CFLAGS)					\
 		$(LOCK_CHECKING_CFLAGS)				\
 		$(WIN32_EXTRA_CFLAGS)				\
 		$(COVERAGE_CFLAGS)
-AM_LDFLAGS = $(COVERAGE_LDFLAGS)
+AM_LDFLAGS =	$(DRIVER_MODULE_LDFLAGS)			\
+		$(COVERAGE_LDFLAGS)
 
 EXTRA_DIST = $(conf_DATA) util/keymaps.csv